The Focal Lengths of the Objective Lens and the Eyepiece

question 77

Multiple Choice

The focal lengths of the objective lens and the eyepiece of a microscope are 0.50 cm and 2.0 cm,respectively,and their separation is 6.0 cm when adjusted for minimum eyestrain for a person with a near point of 25.0 cm.If the microscope is focused on a small object,the magnitude of its final overall magnification is closest to

• A)50.
• B)100.
• C)150.
• D)200.
• E)250.

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Definitions:

EPA

The United States Environmental Protection Agency, a federal agency responsible for protecting human health and the environment by regulating pollutants and ensuring compliance with environmental laws.

Unreasonable Risk

A risk that is not justifiable given the current knowledge of a harmful event's likelihood and severity.

CERCLA

The Comprehensive Environmental Response, Compensation, and Liability Act, a U.S. law aimed at the cleanup of sites contaminated with hazardous substances and pollutants.

SARA

An acronym that stands for Superfund Amendments and Reauthorization Act, legislation aimed at addressing hazardous waste and environmental cleanup.